Best zoo animal photos of 2014

CaptionSan Diego Zoo Safari Park

Ken Bohn / San Diego Zoo

A 6-week-old cheetah cub at the San Diego Zoo Safari Park named Ruuxa was rejected by its mother and has no siblings. But keepers have given her a companion, a 7-week-old Rhodesian ridgeback puppy named Raina.

A 6-week-old cheetah cub at the San Diego Zoo Safari Park named Ruuxa was rejected by its mother and has no siblings. But keepers have given her a companion, a 7-week-old Rhodesian ridgeback puppy named Raina. (Ken Bohn / San Diego Zoo)

Three baby white lions with their mother, Azira, sit in their enclosure at a private zoo in Borysew, Poland. Born Jan. 28, they will be let out into the open air in April and will be available for visitors to see in May.

Three baby white lions with their mother, Azira, sit in their enclosure at a private zoo in Borysew, Poland. Born Jan. 28, they will be let out into the open air in April and will be available for visitors to see in May. (Czarek Sokolowski / Associated Press)

Gorilla mother Kumili holds her newborn at the zoo in Leipzig, Germany. The baby gorilla was born during the night between March 10 and 11, 2014, and its gender is still unknown.

Gorilla mother Kumili holds her newborn at the zoo in Leipzig, Germany. The baby gorilla was born during the night between March 10 and 11, 2014, and its gender is still unknown. (Peter Endig / Associated Press)

A tree-kangaroo joey in the pouch of its mother, Qwikila, at Taronga Zoo in Sydney, Australia. The endangered Goodfellow's tree-kangaroo has shown off its first joey in captivity, born in September, in more than 20 years in Sydney.

A tree-kangaroo joey in the pouch of its mother, Qwikila, at Taronga Zoo in Sydney, Australia. The endangered Goodfellow's tree-kangaroo has shown off its first joey in captivity, born in September, in more than 20 years in Sydney. (Taronga Zoo)

Polar bear cub plays with polar bear mother Gerda in the zoo in Novosibirsk, Russia. The first cub of polar bear couple Kai and Gerda was born at Novosibirsk Zoo in early December 2013.

Polar bear cub plays with polar bear mother Gerda in the zoo in Novosibirsk, Russia. The first cub of polar bear couple Kai and Gerda was born at Novosibirsk Zoo in early December 2013. (Ilnar Salakhiev / Associated Press)